Meaning "omit intervening parts" first recorded late 14c. Meaning "fail to attend" is from 1905. Meaning "to cause to skip or bound" is from 1680s. The custom of skipping rope has been traced to 17c.; it was commonly done by boys as well as girls until late 19c.

1550s, "a pert shallow-brained fellow; a puppy, a whipper-snapper; a conceited fop or dandy" [OED], from skip (v.) + generic name jack (n.). Applied 1703 to tropical fishes with leaping tendencies. In reference to a kind of sailing boat used on Chesapeake Bay, attested from 1887.

"captain or master of a ship," late 14c., from Middle Dutch scipper, from scip (see ship (n.)). Compare English shipper, used from late 15c. to 17c. in sense "skipper." Transferred sense of "captain of a sporting team" is from 1830.

"to make a shrill sound," mid-15c., from a Scandinavian source (compare Norwegian skyrla, skrella "to shriek"), of imitative origin. In reference to bagpipes, it is attested by 1660s and now rarely used otherwise. As a noun 1510s from the verb.

late 14c., from Old French escarmouche "skirmish," from Italian scaramuccia, earlier schermugio, probably from a Germanic source (compare Old High German skirmen "to protect, defend"), with a diminutive or depreciatory suffix, from Proto-Germanic *skerm-, from PIE *(s)ker- (1) "to cut" (see shear (v.)).

Influenced in Middle English by a separate verb skirmysshen "to brandish a weapon," from Old French eskirmiss-, stem of eskirmir "to fence," from Frankish *skirmjan, from the same Germanic source. Compare scrimmage. Other modern Germanic forms have an additional diminutive affix: German scharmützel, Dutch schermutseling, Danish skjærmydsel. Skirmish-line attested by 1864.

early 14c., "lower part of a woman's dress," from Old Norse skyrta "shirt, a kind of kirtle;" see shirt. Sense development from "shirt" to "skirt" is possibly related to the long shirts of peasant garb (compare Low German cognate Schört, in some dialects "woman's gown"). Sense of "border, edge" (in outskirts, etc.) first recorded late 15c. Metonymic use for "women collectively" is from 1550s; slang sense of "young woman" is from 1906; skirt-chaser first attested 1942.

"contemptible person," 1790, Scottish and Northern, earlier "sudden stroke or blow" (1785), perhaps from Old Norse skyt-, from skjota "to shoot" (see shoot (v.)). Old Norse skita "to shit" might have had some influence on the sense of the English word.

game played with nine pins, 1630s, plural of skittle, the word for the pins used in the game, probably from a Scandinavian source (compare Danish and Norwegian skyttel "shuttle, child's toy"). But OED says there is no evidence of a connection.

also skol, Scandinavian toasting word, c. 1600, from Danish skaal "a toast," literally "bowl, cup," from Old Norse skal "bowl, drinking vessel," originally a cup made from a shell, from Proto-Germanic *skelo, from PIE *(s)kel- (1) "to cut" (see shell (n.)). The word first appears in Scottish English, and may have been connected to the visit of James VI of Scotland to Denmark in 1589.

1767, Norse name for inhabitants of Greenland encountered by the Viking settlers there, from Old Norse Skræingjar (plural), apparently literally "little men" (compare Icelandic skrælna "shrink"); another term for them was smair menn. The name may have been used first in reference to the inhabitants of Vineland (who would have been Indians), then transferred to Eskimos, who adopted it into their own language as Kalaleq.

Hans Egede, who published a dictionary of Greenland Eskimo in 1739, says that the Eskimos themselves told him that they got the name from the Norsemen who once lived in Greenland. [Gordon, p.217-8]

"bony framework of the head," c. 1200, probably from Old Norse skalli "a bald head, skull," a general Scandinavian word (compare Swedish skulle, Norwegian skult), probably related to Old English scealu "husk" (see shell (n.)). But early prominence in southwestern texts suggests rather origin from a Dutch or Low German cognate (such as Dutch schol "turf, piece of ice," but the sense of "head bone framework" is wanting). Derivation from Old French escuelle seems unlikely on grounds of sound and sense. Old English words for skull include heafod-bolla.

c. 1200, "a cloud," from Old Norse sky "cloud," from Proto-Germanic *skeujam "cloud, cloud cover" (source also of Old English sceo, Old Saxon scio "cloud, region of the clouds, sky;" Old High German scuwo, Old English scua, Old Norse skuggi "shadow;" Gothic skuggwa "mirror"), from PIE root *(s)keu- "to cover, conceal" (see hide (n.1)).

Meaning "upper regions of the air" is attested from c. 1300; replaced native heofon in this sense (see heaven). In Middle English, the word can still mean both "cloud" and "heaven," as still in the skies, originally "the clouds." Sky-high is from 1812; phrase the sky's the limit is attested from 1908. Sky-dive first recorded 1965; sky-writing is from 1922.

"to frolic or play," 1809, originally nautical, in reference to "wanton play about the rigging, and tops," probably from skylark (n.), influenced by (or from) lark (n.2). Related: Skylarked; skylarking.

1680s, type of firework, from sky (n.) + rocket (n.2). The verb, in the figurative sense of "to rise abruptly and rapidly" (often with suggestion of 'and then explode and vanish'") is attested from 1895.

very tall urban building, 1888, in a Chicago context, from sky (n.) + agent noun of scrape (v.). Used earlier for "ornament atop a building" (1883), "very tall man" (1857), "high-flying bird" (1840), "light sail at the top of a mast" (1794), and the name of a racehorse (1789). Compare cognate French gratte-ciel, from gratter "to scrape" + ciel "sky;" German Wolkenkratzer, from Wolke "cloud" + Kratzer "scraper."

late 13c., "large, flat mass," of unknown origin, possibly related to Old French escopel, escalpe "thin fragment of wood," which according to Klein is possibly a Gaulish word (compare Breton scolp, Welsh ysgolp "splinter, chip"). But OED rejects this on formal grounds. Meaning "rectangular block of pre-cast concrete used in building" is from 1927. Slab-sided is "having flat sides like slabs," hence "tall and lank" (1817, American English).

early 14c., "cessation" (of pain, grief, etc.), from slack (adj.). Meaning "a cessation of flow in a current or tide" is from 1756; that of "still stretch of a river" is from 1825. Meaning "loose part or end" (of a rope, sail, etc.) is from 1794; hence figurative senses in take up the slack (1930 figuratively) and slang cut (someone) some slack (1968). Meaning "quiet period, lull" is from 1851. Slacks "loose trousers" first recorded 1824, originally military.

Sense of "not tight" (in reference to things) is first recorded c. 1300. As an adverb from late 14c. Slack-key (1975) translates Hawaiian ki ho'alu. Slack water (n.) "time when tide is not flowing" is from 1769. Slack-handed "remiss" is from 1670s. Slack-baked "baked imperfectly, half-baked" is from 1823; figuratively from 1840.

1510s, "to moderate, make slack," back-formed from slack (adj.) after the original verb veered into the specialized sense of slake. Meaning "be remiss, inactive or idle, fail to exert oneself" is attested from 1540s; current use is probably a re-coining from c. 1904 (see slacker, and compare Old English slacful "lazy," sleacmodnes "laziness"). Related: Slacked; slacking.